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All Journal Jurnal Riset Kesehatan Science and Technology Indonesia Journal of Medicine and Health Communications in Science and Technology Jurnal Biomedika dan Kesehatan Padjadjaran Journal of Dental Researchers and Students Jurnal Pelayanan dan Pengabdian Masyarakat (Pamas) Automotive Experiences Journal of Urban Health Research Jurnal Kedokteran Meditek Biomedika Journal of Medicine and Health Mitramas Jurnal Pengabdian dan Pemberdayaan Masyarakat Mitramas Jurnal Pengabdian dan Pemberdayaan Masyarakat
Evi Ulina Margaretha Situmorang
Departemen Fisiologi-Fisika, Fakultas Kedokteran Dan Ilmu Kesehatan, Universitas Katolik Indonesia Atma Jaya, Jakarta
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health

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Journal : Science and Technology Indonesia

 1 
A Small Amount of Sn Addition Effect to Cu-15Zn Alloy on Structure, Microstructure, Hardness, Corrosion Resistance, and Antibacterial Activity Basori, Imam; Sari, Yunita; Prasetya, Dendy Wardhana; Susetyo, Ferry Budhi; Alias, Juliawati; Budi, Setia; Yudanto, Sigit Dwi; Hasbi, Muhammad Yunan; Situmorang, Evi Ulina Margareta; Edbert, Daniel
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.2.443-451

Abstract

Cu-15Zn alloy is widely used as a heat exchanger pipe. CuZn alloy was also used for cardiovascular implant applications. Several problems have been found in that alloy, such as less corrosion resistance. Therefore, various Sn (0.2, 0.7, 1, and 2 wt.%) were added to Cu-15Zn alloy in the present research to enhance corrosion resistance. Afterwards, the alloy was homogenized at 800 °C for 2 hours. Several investigations were conducted, such as structure, microstructure, hardness, corrosion resistance, and bacterial activity, using XRD, Optical microscope, Vickers hardness, Potentiostat equipment, and Digital camera. More Sn content leads to an increase in volume and a decrease in hardness. Presenting Sn in the alloy does not influence the phase in the alloy microstructure. The highest Sn content in the alloy promoted a more positive value of the alloy, indicating that the sample is more cathodic, probably due to the protective layer on the surface. A concentration of 1 wt.% Sn exhibits the most effective antibacterial effect probably due to the small crystallite size.
Cu Film Characteristics Synthesized Using Electrodeposition Technique at Various Currents and Under a Rotating Neodymium Magnet Susetyo, Ferry Budhi; Basori; Mansor, Muhd Ridzuan; Ruliyanta; Yudanto, Sigit Dwi; Rosyidan, Cahaya; Situmorang, Evi Ulina Margareta; Edbert, Daniel; Mutiara, Etty; Yulianto, Tri; Agus Jamaludin; Nanto, Dwi
Science and Technology Indonesia Vol. 10 No. 4 (2025): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.4.1156-1168

Abstract

In the present study, Cu films were made over Al alloy using the electrodeposition technique. Electrodeposition conducted at various currents (80, 100, and 120 mA), with and without influence by a rotating magnetic field (100 rpm of rotation). 0.5 M CuSO4 + 20 mL of H2SO4 was used for electrolyte solutions. The sample before and after electrodeposition was weighed using digital scale to calculate deposition rate and current efficiency. All formed Cu films were characterized using X-ray diffraction (XRD), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), Scanning electron microscopy equipped with Energy dispersive spectroscopy (SEM-EDS), and Potentiostat apparatus. Furthermore, antibacterial activity using Staphylococcus aureus was also investigated. Increasing the current of electrodeposition leads to an increase in deposition rate and current efficiency for both conditions (with and without rotating magnetic field influence). Based on the XRD and ATR-FTIR investigation, Cu was successfully deposited onto Al surface. Currents used for the electrodeposition process between 80-100 mA would result in a faceted structure, while using 120 mA results near to spheroidal. Shifting to higher currents leads to decreases in grain sizes and presenting a rotating magnetic field also enhances the grain size. Current and rotating magnetic influences are not linearly influencing corrosion potential, corrosion rate and antibacterial activity. The sample made using higher current plus influencing with a rotating magnetic field has less corrosion rate and higher area of inhibition at around 0.808 mmpy and 4.01 cm2.
Structural, Electrochemical, Bacterial Activity, Hardness, and Thermal Properties of Mg Alloy with Various Zn Contents Premono, Agung; Basori, Imam; Sukarno, Ragil; Susetyo, Ferry Budhi; Alhamidi, A. Ali; Anugrah, Hanif Setia; Muqafillah, Mochammad Fajr Dzakwan; Yudanto, Sigit Dwi; Hasbi, Muhammad Yunan; Situmorang, Evi Ulina Margareta; Edbert, Daniel; Mutiara, Etty; Kriswarini, Rosika; Jamaludin, Agus; Ajiriyanto, Maman Kartaman; Rosyidan, Cahaya
Science and Technology Indonesia Vol. 11 No. 1 (2026): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2026.11.1.96-108

Abstract

Magnesium (Mg) alloy is used for various medical purposes, such as bone implants. In the present study, MgAlSixZn alloys were created utilizing the gravity casting by adding various Zinc (Zn) (x is 0, 0.5, 1.2, and 1.7 wt.%) and then homogenized at 400 ◦C for around two hours. MgAlSixZn as homogenized samples were investigated for microstructure, phase structure, electrochemical behavior, surface morphology, bacterial activity, hardness, and thermal behavior using an optical microscope, XRD, Potentiostat, SEM-EDS, digital camera, Vickers hardness test, and Thermogravimetric apparatus, respectively. Several findings include that increasing Zn content implies a grain growth inhibition mechanism facilitated by Zn segregation at grain boundaries, increased corrosion rates, a rise in the hardness, and increased weight loss. It should be noted that the increase in the corrosion rate and weight loss occurs linearly for Zn addition in the Mg alloy until 1.2 wt.%. An increase in Zn concentration causes the peak shift in MgAlSi-based alloy samples, but no crystallographic orientation is apparent. At the end, the highest corrosion rate and inhibition area are observed in MgAlSi1.2Zn, which indicates that it is suitable for biodegradable orthopedic wire.
Co-Authors Agus Jamaludin Agus Jamaludin Alhamidi, A. Ali Alias, Juliawati Anugrah, Hanif Setia Ardelina C Hartanto Aristo, Emanuel Jovan Arnold Ferdy Yanto Audrey Jessica Jusran Bambang Soegijono Basori Basori Basori Budiyanti, Ecie Cahaya Rosyidan Cliffton, Cliffton Daniel Edbert, Daniel Divara Ariesta Sekar Suryadi, Made Dwi Nanto, Dwi Edward Surjono, Edward Etty Mutiara Evans, Gunterus Evans, Guterus Fan, Tan Fei Ferry Budhi Susetyo Freggy S. Joprang Hasbi, Muhammad Yunan Heidy Heidy Heri Hardiyanti Imam Basori Jojor Lamsihar Manalu Jonny Setiawan Joprang, Freggy Spicano Julia Rahadian Kurniawan, Sandy Vitria Laurentius Aswin Pramono Linawati Hananta, Linawati Lonah, Lonah Maman Kartaman Ajiriyanto Mansor, Muhd Ridzuan Maria Dara Novi Handayani, Maria Dara Novi Mariani Santosa, Mariani Mora Octavia Mora Octavia Mora Octavia Muhaji, J. Antonio Muqafillah, Mochammad Fajr Dzakwan Nathaniel, Bryan Nawanto Agung Prastowo Pakpahan, Hotmaria Agustina Paul, Clara Stephanie Prasetya, Dendy Wardhana Premono, Agung Rika Haryono Rita Dewi Rita Dewi Dewi Rosika Kriswarini Ruliyanta Ruliyanta Setia Budi Sudiyono, Nelson Sukarno, Ragil Surianggo, Jenita Syamsuir, Syamsuir Tri Yulianto Usman, Hadiyanto Yantho, Erwin Yudanto, Sigit Dwi Yuliana Yuliana Yunita Sari Zita Arieselia